7a-20=80

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Solution for 7a-20=80 equation: 


Simplifying
7a + -20 = 80

Reorder the terms:
-20 + 7a = 80

Solving
-20 + 7a = 80

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '20' to each side of the equation.
-20 + 20 + 7a = 80 + 20

Combine like terms: -20 + 20 = 0
0 + 7a = 80 + 20
7a = 80 + 20

Combine like terms: 80 + 20 = 100
7a = 100

Divide each side by '7'.
a = 14.28571429

Simplifying
a = 14.28571429

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